The Axe module works exactly as we want it. It is a choice between two things - how it is now, or having it work on EVERYTHING that an axe works on.
It doesn't work on BoP wood, Forestry Wood, Signs, Chests, Cables, etc. It is basically useless as it stands in most of the packs it is put in. 9 times out of 10 when I want to use it it doesn't work. I carry an iron axe with me and uninstall the axe module because it's not worth dealing with on the keybind screen. And if you're concerned about this, then why praytell do you let it work on factorization barrels? For the lag and framerate killing fun?
I suspect you do not realize how many things it doesn't work on in FTB. It's hard to find things it does work on. Did you know that BoP overwrites some vanilla blocks and when it does, it stops working on those too?
This includes chests, and random things such as IC2 cables. We received a bunch of complaints about people busting their chests or wires unintentionally so the change was made to only affect trees. It is the safer path.
This is because of the way you do the search for the bulk cut. You should traverse vertically the way Dartcraft and Tinker's Construct do rather than being the very best tool for dealing with Mystcraft wooden tentacles. It's sort of a niche award. Trust me, dartcraft tools annihilate N-wide trees plenty well.
I give you this harsh criticism because I like your mod and this is a glaring flaw with it. I
want to be able to cut cables rather than stand there like an ass waiting 5 seconds for cables to break as a flail at them with a floppy robotic arm like I'm playing Ampu-tea.